Cutting attachment for motorized road machines



p 1967 1.. B. STRAWBRIDGE CUTTING ATTACHMENT FOR MOTORIZED ROAD MACHINES 2 Sheets-Sheet 1 Filed NOV.

xii /5 7 l INVENTOR L0 VD B. STKAWBRIDGE ZQZIT ATTGEMEYS.

p 12, 1967 1.. B, STRAWBRIDGE 3,340,631

CUTTING ATTACHMENT FOR MOTORIZED ROAD MACHINES 2 Sheets-Sheet f;

Filed Nov. 24, 1964 INVENTOR L OY 5 STRAWBRIDGE ATTOE/VEYS,

United States Patent Ofifice 3,340t68l Patented Sept. 12, 1967 3,340,681 CUTTING ATTACHMENT FOR MOTORIZED ROAD MACHINES Loyd Bryas Strawbridge, Aberdeen, Miss., assignor to BSW Manufacturing Company, Inc., a corporation of Mississippi Filed Nov. 24, 1964, Ser. No. 413,417 2 Claims. (Cl. 56-229) The present invention relates to motorized road machines and is more particularly concerned with an attachment for such machines to enable them to be used in clearing vegetation and growths alongside roads.

The principal object of the present invention is to provide an attachment for various types of prime movers used in maintaining roads and adjacent areas which attachment is capable of clearing road shoulders, road ditches, foreslopes, backslopes, and other areas of uneven terrain of brushes, weeds, vines, undergrowth, small trees having a trunk diameter up to six inches and like growths and which attachments can be quickly and easily attached to or disconnected from its prime mover as well as having its vertical angle readily varied as desired. Another important object of the present invention is to provide an attachment for road machines which attachment provides a cutter blade extending laterally of the side of the road machine which cutter blade has a shearing action as well as a sawing action upon growths contacted thereby when said blade is drawn against the growth by the road machine and without requiring any other motion of the cutter blade other than its movement with the road machine.

Further objects of the invention will be in part obvious and in part pointed out in the following detailed description of the accompanying drawings, in which,

FIG. 1 is a top plan view of the present attachment carried by a road scraping machine.

FIG. 2 is a top view of the attachment connected to an end portion of the blade of a road scraping machine, and with various positions of said attachment indicated in broken lines.

FIG. 3 is a topview of the attachment connected to an end portion of the blade of a road scraping machine.

FIG. 4 is a cross-sectional view taken on line 44 of FIG. 2.

FIG. 5 is a cross-sectional view taken on line 5-5 of FIG. 2.

FIG. 6 is a cross-sectional View taken on line 6-6 of FIG. 2, and

FIG. 7, is a side view of a modified portion of the present attachment using a hydraulic cylinder lift.

Referring now more particularly to the accompanying drawings in which like and corresponding parts are indicated by similar reference characters, numeral 1 generally indicates -a cutter blade having a flat top 2, front serrated edge 3 having a series of teeth 4 with each tooth being formed by an edge 5 slanting inwardly of edge 3 from the left towards the right of FIG. 3 and an opposite edge 6 slanting slightly from the normal relative to edge 3 on a right to the left slant of FIG. 3 and a flat point 7. All of the flat points 7 extend in a straight line with front edge 3. Said cutter blade further has a slanting corner 8 extending to inner end 9, a straight rear edge .10 parallel to front edge 3, a curved outer end 11 and flat bottom 12 parallel to the top 2. Said front edge 3 and teeth 4 also have a straight slanting face 13 which slants outwardly from top 2 to bottom 12 as shown in FIGS. 5 and 6.

A key 14 is embedded in the rear edge of said blade 1 as shown in FIGS. 3 and 6.

An angle iron has side 15 extending longitudinally of plate 1 and positioned on the rear medial portion of top 2 with its side 16 extending upright thereon. A series of bolts 17 extend through blade 1 and side 15 with nuts 18 thereon retaining side 15 against top 2. A serrated shield plate 19 extends on a slant from side 15 to side 16 and is welded thereto.

A second angle iron has a side 20 also extending longitudinally of plate .1 and positioned on the rear marginal portion of top 2 and extending therefrom with its other side 21 abutting side 16 of said first angle iron. A series of bolts 22 extend through blade 1 and side 20 with nuts 23 thereon retaining side 20 on top 2.

Key 14 is welded to blade 1 and also side 20 of said second angle iron.

A serrated shield plate 24 extends on a slant from side 20 to side 21 and is welded thereto.

Side 20 and shield plate 24 are recessed at the corner formed by end 9 and rear edge 10 and a plate 20b has an end portion seated on saidcorner and welded to blade 1, and side 20 while the remainder of said plate 20b extends normal to and rearwardly of blade 1. A triangular brace plate 20a is Welded to the edge of side 20 and the inner extended side of plate 20b.

An ear 25 is mounted on the tops of sides '16 and 21 of said angle irons extending upright and is welded to said sides. Said ear has an opening 26 through which extends bolt 27. An elongated channel member 28 has corresponding series of openings 28a along the length thereof and has ear 25 extending into the channel thereof with bolt 27 also extending through one pair of said openings 28a.

Three parallel hinge bars 29, 30 and 31 extend longitudinally from edge f blade 1 with bars 29 and 30 Welded to plate 201) and bar 31 weldedto side 15.

Further parallel hinge bars 32, 33, 34 and 35 are pivotally connected to bars 29 to 31 by a pintle 36 extending through corresponding openings in said bars.

A triangular base plate 37 has bars 32 to 35 spaced therealong and extending laterally thereof while being welded thereto. Said base plate has an upturned straight front wall 38, with an angle reinforcing iron 39 extending along the rear marginal portion of said base plate and welded thereto. Said wall 38 has a series of openings 38a provided along the length thereof.

An upright 40 is mounted on said base plate 37 and has its bottom end welded thereto. A pin 41 detachably extends through one pair of said openings 28a and a corresponding opening in upright 40. g

A mold board 42 is also mounted upright on base plate '37 and is welded thereto while a guide plate 43 extends forwardly of wall 38 and is Welded to both said wall 38 and mold board 42.

FIG. 7 shows a modification of the present cutter attachment which uses a pneumatic cylinder 44 with piston rod 45 instead of channel member 28. That is piston rod 45 is connected to pin 27 while cylinder 44 has an eye 48 pivotally connected to pin 41 on upright 40. Said cylinder has inlet tubes 46 and 47 to be connected to conventional sources of air under pressure and their controls (not shown) which are generally carried by motorized road maintenance machines.

The present cutter attachment can be attached to vari ous forms of road maintenance machines such as tractors, motor operated graders, road patrol vehicles and the like, but for the purpose of describing the operation of the cutter attachment and by way of an example only, the same is referred to as mounted on a conventional motorized road grader A having a blade supporting circle B rotatably supported by frame C of said road grader and carrying a road scraper blade D. Controls C are used by the operator to rotate circle B and thus change the angle of blade D as desired.

The present front wall 38 is attached to the end rear face of blade D at its lower marginal portion by bolts (not shown) extending through blade D and holes 38a in said wall 38 with nuts retaining these elements together. Mold board 42 is thus positioned upright alongside the end of blade D. Due to wall 38 extending on a slant relative to the axis of blade 1, said plade 1 now extends with bottom face 12 facing the ground, but with the longitudinal axis of blade 1 extending on a rearward slant from blade D as shown in FIG. 1.

By removing pin 41 channel member 28 can be moved along upright 40 and pin 41 reinserted in any of the openings 28a and upright 40 to vary the angle of blade 1 relative to blade D as indicated in broken lines in FIG. 2 so that blade 1 can ride over ground which slopes up or down relative to road F or lever therewith as required.

'When using the modification of FIG. 7, the operator of the road grader can supply compressed air by controls E to either inlet 46 or 47 to vary the angle of blade 1 relative to blade D for adjusting the position of blade 1.

Thereafter by driving the road grader A along road F blade 1 will gather the brushes, Weeds, small trees and the like between teeth 4 into a concentrated are so that the growths will be cut or sheared more readily, by said teeth and the growth will not have the tendency to slide under the cutter blade 1 with as much ease as they would if the leading edge 3 of said cutter blade was smooth or knife edge alone. Said serrated edge 3 provides a sawing action in cutting said growth as well as a straight shearing cut, especially when said blade D of motor grader A is set with a horizontal angle greater than ninety degrees relative to the longitudinal center line of motor grader A. The lateral angle of blade is determined by the operator to obtain the best growth cutting action thereof under individual conditions.

Blade 1 can be readily separated from wall 38 and thus motor grader A by simply removing pin 41 and pintle 36 when desired. Like-wise blade 1 can be connected to wall 38 by reinserting pintle 36 through hinge bars 29 to 35 inclusive and pin 41 through channel member openings 28a and upright 40 as desired.

While the present cutter attachment has been shown and described attached to motor grader A, it is to be :ap-

preciated that wall 38 can likewise be connected to other types of conventional prime movers as well.

The present cutter attachment is capable of considerable modification .and such changes thereto as come within the scope of the appended claims is considered to be a part of the invention.

I claim:

1. A growth cutter attachment for motorized road machines having a road scraper blade moveably attached thereto comprising a flat elongated cutter blade having a leading edge, and means for 'adj ustably connecting an end of said cutter blade to an end of the road scraper blade with said cutter blade extending on a rearward slant relative to the longitudinal length of and laterally of the height of said road scraper blade, said cutter blade leading edge having a series of teeth therealong with each tooth having an edge slanting inwardly from said leading edge towards said cutter blade end, an opposite edge slanting slightly from the normal to said leading edge, a fiat point with all points extending in a straight line with said leading edge and a slanting top face.

2. A growth cutter attachment for motorized road machines having a road scraper blade moveably attached thereto comprising a flat elongated cutter blade having a serrated leading edge, means for adjustably connecting an end of said cutter blade to an end of the road scraper blade with said cutter blade extending on a rearward slant relative to the longitudinal length of and laterally of the height of said road scraper blade including a plate pivotally connected to said cutter blade, and means for connecting said plate to the road scraper blade for extending laterally thereof and a mold board fixedly mounted on said plate for extending upright when said plate is connected to said road scraper blade.

ABRAHAM G. STONE, Primary Examiner.

ANTONIO F. GUIDA, Examiner. 

1. A GROWTH CUTTER ATTACHMENT FOR MOTORIZED ROAD MACHINES HAVING A ROAD SCRAPER BLADE MOVEABLY ATTACHED THERETO COMPRISING A FLAT ELONGATED CUTTER BLADE HAVING A LEADING EDGE, AND MEANS FOR ADJUSTABLY CONNECTING AN END OF SAID CUTTER BLADE TO AN END OF THE ROAD SCRAPER BLADE WITH SAID CUTTER BLADE EXTENDING ON A REARWARD SLANT RELATIVE TO THE LONGITUDINAL LENGTH OF AND LATERALLY OF THE HEIGHT OF SAID ROAD SCRAPER BLADE, SAID CUTTER BLADE LEADING EDGE HAVING A SERIES OF TEETH THEREALONG WITH EACH TOOTH HAVING AN EDGE SLANTING INWARDLY FROM SAID LEADING EDGE TOWARDS SAID CUTTER BLADE END, AN OPPOSITE EDGE SLANTING SLIGHTLY FROM THE NORMAL TO SAID LEADING EDGE, A FLAT POINT WITH ALL POINTS EXTENIDNG IN A STRAIGHT LINE WITH SAID LEADING EDGE AND A SLANTING TOP FACE. 